Leveling-instrument



(No Model.)

' 3 Sheets-=Sheet 1. G. A. KARE.

LEVBLI NG INSTRUMBNTI I No. 397,294. Patented Peb.- 5, 1889. v

.uiz

ATTORNEY n. Pnzns. Pfmzrliihognphnr. Wilhlngion. n c

G. A. KARE. LEVELING INSTRUMENT.

3 Sheets-Sheet 2 (No Model.)

Patented Feb. 5, 1889.

ATTORNEY,

(No Model.)

/ Iii WITNESSES:

G. A. KARR.

LEVELING INSTRUMENT.

3 Sheets-Sheet 3.

Patented Feb. 5, 1889.

N. PETERS. Pholo-Lilhognpher. Wahinfliun D- C Ia: fzyz.

@gio:

INVEIVZOR, uwgww ATTORNEY,

CHARLES ALLEN KARE,

()F GREEN ELM, KANSAS.

SPECIFICATION forming part of Letters Patent No. 897,294, dated February5, 1889.

Application filed June 4, 1888.

To all whom it may concern.-

Be it known that 1, CHARLES ALLEN KARE, of Green Elm, in the county ofCrawford and State of Kansas, have invented a new and ImprovedHydrostatic Iieveling-Instrument, of which the following is a full,clear, and exact description.

The invention relates to hydrostatic leveling-instri'unents, such asshown and. described in Letters Patent No. 375,450, granted to meDecember 27, 1887.

The object of the present invention is to provide an improvedhydrostatic leveling-in strument which is simple and durable inconstruction, compact in form, and easily adapted for the whole range ofwork for which such instruments are used. I

The invention consists of certain parts and details and combinations ofthe same, as will be fully described hereinafter, and then pointed outin the claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure l is a side elevation of the improvement as applied. Fig. 2 is anenlarged end elevation of one of the standards. Fig. 3 is a sideelevation of the same on the line .1 of Fig. 2. Fig. at is a sectionalplan view of the same 011 the line y yof Fig. 3, the ball being removed.Fig. dis an enlarged sectional side elevation of the upper end of onestandard. Fig.6 is an end elevation of one standard as applied to aleveling-rod. Fig. '7 is an enlarged sectional plan view of the same onthe line z of Fig. 6, and Fig. 8 is an enlarged sectional end elevationofa modi lied form of clamp for attaching the standard to theleveling-rod.

The improved instrument is provided with the two standards A A, alike inconstruction and operation, so that it suffices to describe one only.The standard A is provided with a base, B, consisting of a bottom, B,supporting the sides 13*, on the upper ends of which is mounted aflanged ring, B in which is set the tube 0, carrying in its interior theglass tube D, in which is placed the liquid used in connection with thestandards.

The outer tube, 0, is provided in one side with a slot, 0, and 011 theedges of the slotis formed a graduation, O representing a suit- SerialNo. 275,983. (No model.)

able measurement. The lower reduced end, 0 of the tube 0 passes throughthe ring B and is provided in its middle with a recess, 0, adapted to beopened and closed by a cock, E, held in the reduced part 0 of the tube(3. The lower end of the. recess O" connects with an apertured plug, F,screwing in the reduced part 0 and on the outer end of this plug F isfastened one end of a flexible tube, G, connecting by its other end withthe plug F of the standard A, as is plainly shown in Fig. 1. Theflexible tube G is passed over the obstruction H between the twostandards A and A. In thereduced end C also screws ing for the purposeof filling the instrument. In order to secure the outer tube, C, firmlyto the base B, I fasten the lower end of the reduced part C of the saidtube to the bottom 13 either by screwing the lower end into the saidbottom or fastening it by other suitable means.

In the upper end of the outer tube, 0, screws the cap I, the bottom I ofwhich restson the gasket I), held 011 the upper end of the glass tube D.A similar gasket, D is placed at the lower end of the said glass tube D,as is plainly shown in Fig. 3. Inthe bottom I of the cap I is formed an.aperture, I and in the interior of the said cap I is formed a number ofprojections, 1 on which is fitted to slide vertically a hollow valve, J,preferably cylindrical in form, and provided at its upper end with acylindrical mouth, J, passing through an opening, 1 formed centrally ina cross-plate, I on. the cap I.

In the upper open end of the cap I tits loosely a plug, K, provided on.its under side ting into a similarly-shaped offset, 1, formed on theinside of the cap I. hen the plug K is turned, it moves up or down onaccount of the said spiral proj ectionK' traveling on the offset I, asplainly shown in Fig. 5. In the middle of the plug K is formed anaperture, K in which is held to slide a plate, L, carrying adownwardly-extending rod, 0, on which is coiled a spring, N, the upperend of which rests against the under side of the said plate L, its otherend resting on the bottom K of the opening K a plug, F, leading to therecess 0 and serv near its rim with a spiral projection, K, fit- The rod0 extends through the bottoinK and is connected with adowuwardly-extending chain, I passing through the mouth .I of the valve.I into the latter, supporting a ball, Q, held inside ol:' the valve J,and connected by a short chain, P, with the bottom of the valve, so asto sustain said ball Q near the middle in the interior of the saidvalve. As shown in Fig. 5, the plug Ii in its uppermost position, sothat the top ol. the valve .1 closes the opening I of the cap I. Whenthe plug K is turned and moves dmvnward, the valve .I falls by its ownweight and opens the aperture 1, so that air from the outside can passthrough the said aperture and through the cap I and o )ening 1 into theclosed tube I). If the standard A or A is iioodcd, the valve .I willrise and close the opening I, so as to preventthe escape of the fluid inthe glass tube. It the standard is overturned, the weight of the ball Q,acting on the chains I and P, draws the valve J outward and also closesthe opening I, so that the liquid in the glass tube is not spilled.

When it is desirable to fasten the standard to a leveliugrod, R, Iemploy a clamp, S, such as shown in Figs. 6 and 7. This clamp Sis fittedto slide on the rod R, and is provided on its bottom with an arm, S,having a recess into which fits the bottom B of the base B. A similararm, S is secured to the upper end of the clamp S and fits onto the topend of the cap I, as shown. A central openiu g is formed in the said armS so as to admit air in the glass tube I). In the middle of the clampSis a screw, S, bearing against the block S fitting onto the back of theleveling-rod It, so that when the said screw is adjusted the clamp S isfirmly attached to the leveling-rod R. 13y turning back the screw S" theclamp S can be moved up and down on the levelingrod, carrying with itthe standard A.

Instead of employing the block S and screw I may use the arrangementshown in Fig. 8, in which the plate S is pressed. against the back ofthe leveling-rod R by a spring, S, held in theclamp S and pressingagainst the said block S The block S can be withdrawn outof contact withthe back of the levelingrod by a lever, S", fnlcrumed on the clamp S,pivotally connected with'a lug, S projecting from the rear end of theblock S". \Vhen the operator presses on the lower end of the lever S,the block {5 moves out of contact with the back of the leveling-rod R,and the clamp S, with the standard A, can be moved up and down on theleveling-rod to any desired position, and then the operator releases thepressure on the lever 8, so that the spring forces the block S" intocontact with the leveling-rod It, whereby the clamp S is attached at anydesired position on the leveling-rod R.

In order to indicate the precise level of the liquid in the tube Don thegraduation on the leveling-rod R, I employ a pointer, T, held adjustably on the exterior tube, 0, and extending to the graduation on theleveling-rod R. I prefer the construction shown in Figs. 6 and 7, inwhich the pointer is provided with a plate, T, resting against one sideof the outer tube, (1, and against one side of the leveling rod. R nearits graduation. One end, T of the said plate '.l. is bent at rightangles and extends over the slot (1 and the graduation 0 of the tube (3,the other end, T, of the said plate '1." beingon the graduation of theleveling-rod Ii.

()n the inside of the plate T is pivoted an L-shaped arm, T, extemling,with its arm T", on the outer tube, C, opposite the plate T, and betweenthe arm T and the arm '1 of the plate T placed a spring, T to force thearm T in firm contact with the tube whereby the pointer T is clamped onthe tube G and can be easily moved up and down to the positionindicating the level of the liquid in the glass tube D.

I do not limit myself to the precise construction of the several partsshown, as I may vary them according to special uses of the instrument.

Having thus fully described my invention, I claim as newand desire tosecure by Letters Patent 1. In a hydrostatic levelingii'istrument,standards, and a tube for connecting the bases of the standards witheach other, in combination with a cap secured to the upper end of eachstandard and provided with an air-inlet, a valve held to slide in thesaid cap and adapted to be raised and lowered, a plug held adjnstably onthe said cap, a chain supported by the said pl u g and connected withthe said valve, and a weight held on the said chain inside of the saidvalve, substantially as shown and described.

2. In a hydrostatic lcveling-instrument, the combination, with thestandards, of a cap secured to the upper end of the standards andprovided with an air-inlet, a valve held. to slide in projectitms on theinside of the said cap, a plug provided with a spiral. projectionfitting into a similar ollset on the said cap, arod held yieldingly inthe said plug, a chain connected wit-h. the said rod and passing throughthe open mouth of the valve into the interior of the latter, said chainbeing also connected with the bottom of the valve, and a weight held onthe said chain in the said valve, substantially as shown anddescribwl.

3. In ahydrostaticlevelinginstrnment, the combination, with the base Iprovided with the flanged ring 13, of the tube (.1, fitting into thesaid flanged ring IF, and provided with the reduced end C secured to thebottom of the said base and having a central. recess, a cock held in thesaid reduced end C to open and close the said recess, and an outlet-plugscrewing into the said reduced end and adapted to be connected with aflexible tube, substantially as shown and described.

41:. In a hydrostatic leveling-instrument, the combination, with thebase B, provided with the flanged ring B of the tube 0, fitting into thesaid flanged ring B and provided with the reduced end 0*, secured to thebottom of the base and having a central recess, a cock held in the saidreduced end C to open and close said recess, an outlet-plug screwinginto the said reduced end and adapted to be connected with a flexibletube, and a filling-plug, F, screwing in the said reduced end,substantially as shown and described.

5. The combination, with the liquid-containing standard, of a clamphaving horizontal arms recessed on their adjacent faces to receive theends of the standard and provided with vertically-aligned apertures, aleveling-rod passing through said apertures, a block on the inner sideof the clamp, and means for pressing the block against the leveling-rod,substantially as set forth.

0. In a hydrostatic leveling-instruinent, the combination, with thestandard A, of the clamp S, supporting said standard A, a leveling-rodon which the said clamp is held to slide, and a pointer held adjustablyon the said standard and indicating on the graduations of the saidstandards and the said leveling-rod, substantially as shown anddescribed.

7. In a hydrostatic levelirig-instrument, the combination, with theleveling-rod, of a standard held to slide on the said lei *eling-rod,and the pointer T, held to slide 011 the said standard, being providedwith the plate T, the L- shaped arni T", and the spring T substantiallyas shown and described.

(ITARLES ALLEN KARR.

\Vitn esses: I

JEssE VoIERs, M. J. VoIERs.

